<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .bg {
            /* 鼠标经过的样式 */
            background-color: pink;
        }
        
        table {
            margin: 100px auto;
            width: 800px;
            text-align: center;
            border-collapse: collapse;
            font-size: 14px;
        }
        
        thead tr {
            height: 30px;
            background-color: skyblue;
        }
        
        tbody tr {
            height: 30px;
        }
        
        tbody td {
            border-bottom: 1px solid #d7d7d7;
            color: blue;
            font-size: 12px;
        }
    </style>
</head>

<body>
    <h1>鼠标经过事件：onmouseover；鼠标离开事件 onmouseout</h1>
    <table>
        <thead>
            <tr>
                <th>代码</th>
                <th>名称</th>
                <th>最新公布</th>
                <th>累计净值</th>
                <th>前单位净值</th>
                <th>净值增长率</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td>
            </tr>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td>
            </tr>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td>
            </tr>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td>
            </tr>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td>
            </tr>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td>
            </tr>
        </tbody>
    </table>

    <script>
        // 获取tbody里所有的行
        var trs = document.querySelector('tbody').querySelectorAll('tr');
        for (var i = 0; i < trs.length; i++) {
            // 鼠标经过事件 onmouseover
            trs[i].onmousemove = function() {
                    // console.log('1');
                    this.className = 'bg';
                }
                // 鼠标离开事件 onmouseout
            trs[i].onmouseout = function() {
                this.className = '';
            }
        }
    </script>
</body>

</html>